This is similar to previously reported ext4->btrfs convert success, but then failure on subsequent balance. But this is a different kernel version and totally different call traces, so I've filed it with a separate bug report and email thread.
Kernel 4.2.0rc1 Btrfs-progs 4.1 New ext4 file system populated with several thousand files (Fedora 22 installation) and a 1.5GB ISO. Conversion succeeds with no user space or kernel errors. Btrfs check comes up clean. Deletion of ext2_saved subvolume happens without error, as does defragment. After this btrfs check is still clean. Then major problems on btrfs balance with multiple back traces and the file system is broken, with multiple call traces in sequence ending with kernel BUG. balance fail following successful ext4 to btrfs conversion, BUG at fs/btrfs/extent-tree.c:8078! https://bugzilla.kernel.org/show_bug.cgi?id=101181 -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html